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| Morphology-Controlled Syntheses and Functionalization of Trivacant Silicotungstate Nano-materials |
| Author Name | Affiliation | E-mail | | LIU Ning | College of Chemistry and Chemical Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, Henan University, Kaifeng, Henan 475000, China | | | WANG Jia-Xin | College of Chemistry and Chemical Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, Henan University, Kaifeng, Henan 475000, China | | | WU Ya-Ning | College of Chemistry and Chemical Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, Henan University, Kaifeng, Henan 475000, China | | | CHEN Yu-Hao | College of Chemistry and Chemical Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, Henan University, Kaifeng, Henan 475000, China | | | WANG Guan | College of Chemistry and Chemical Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, Henan University, Kaifeng, Henan 475000, China | wangguan@henu.edu.cn | | ZHANG Dong-Di | College of Chemistry and Chemical Engineering, Henan Key Laboratory of Polyoxometalate Chemistry, Henan University, Kaifeng, Henan 475000, China | ddzhang@henu.edu.cn |
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| Abstract: Two novel nano-materials M3SiW9 (M=Cu(Ⅱ), Co(Ⅱ)) based on polyoxometalate have been successfully synthesized by chemical precipitation method using trivacant Keggin-type silicotungstate as precursor. Cu3SiW9 exhibited extremely rare nanowhisker morphology in polyoxometalate-based nano-materials and Co3SiW9 simultaneously showed uniform nanosphere morphology. Control experiments were implemented to indicate the morphologies of M3SiW9 could be tuned by doping different transition metals. Furthermore, fluorescein sodium was employed as dopant to endow nanowhiskers with an emission peak at 510 nm. Moreover, the nanowhiskers were also used as carriers to combine with CdS quantum dots to improve the photocatalytic property. The results show that when the mass ratio of Cu3SiW9 to CdS was 1:1, the hydrogen production efficiency of the composite was about 10 times that of pure CdS quantum dots. This also confirms that the presence of polyoxometalate can effectively inhibit the recombination of CdS quantum dot photogenerated electrons and holes, thereby greatly improving the efficiency of photolysis of water to produce hydrogen. |
| Keywords: polyoxometalate nanomaterials photoluminescence photolysis of water hydrogen production |
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| LIU Ning,WANG Jia-Xin,WU Ya-Ning,CHEN Yu-Hao,WANG Guan,ZHANG Dong-Di.Morphology-Controlled Syntheses and Functionalization of Trivacant Silicotungstate Nano-materials[J].Chinese Journal of Inorganic Chemistry,2020,36(8):1593-1604. |
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